Fusible link.



P. C. LENZ.

FUSIBLE LINK.

APPLICATION FlLED OCT. 1B, 1915.

Patented Aug. 28, 1917.

PETER o. LENZ, or BROOKLYN, NEW YORK.

FUSIBEE LINK.

Specification of Letters Patent.

Patented Aug. 28, 1917.

Application filed October 18, 1915. Serial no. 56,511.

To all whom it may concern:

Be it known that 1, PETER C. Lnkz, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Fusible Links, of which the following is a specification.

My invention relates in general to fusible links and particularly to the kind employed in holding fire doors, windows and other closures in desired positions and automatically releasing the same in the presence of high temperatures.

The object of this invention is to construct a fusible link in such manner that the parts comprising the same, will, under normal conditions, safely carry the load placed upon them and automatically and positively separate when subjected to high temperatures.

A further object is to construct a fusible link wherein the several holding members will exert the least possible strain upon the fusible material while the link is carry ing the load of the closure.

To accomplish the above object, I have devised and constructed a fusible link here inafter fully described in detail and the features of merit and novelty pointed out in the claims.

In the accompanying drawings:

Figure 1 is a side view partially broken away and shows the link in operative posi tion.

Fig. 2 is a front view of the same.

Fig. 3 is a transverse section on the line Fig. 1.

In the drawings the preferred embodi mentof my invention is disclosed and con sists essentially in a closed link member 1, having pivotally mounted in one end there of a coupling member 2. This coupling member 2 is provided near said pivotal point with a loop 3 which engages one terminal of the closure cable 4, while the other terminal 5 of the closure cable engages the link 1 at a point opposite the pivotal connection of the coupling. The free end 6' of the coupling 2 is made si'iiiiciently long enough to extend through the opening in the link 1 when held the position shown in Fig. 1.

Secured by means to the link member terminal cable 5, is a of a fusible material 7 1, at a point below the holding or retaining member 8. This member is preferably of a kind that will readily and freely disengage ltself from the link and coupling when the fusible material yields to the tempera ture. In order to be free from broken, fiattened, irregular and angular lines, I have preferably shown the holding member in the form of a ball.

It Will be noticed that the holding ball is firmly attached between the two bars of the link the fusible material 7 in such manner that the said ball rests directly against the link and leaves the outer surface of said ball free to engage the free end 6 of the coupling.

It has been found that the best result is obtained by having the link member, coupling member and holding member assembled in the relative positions shown in Fig. 1, that is, so that when the terminals & and 5 are pulled in opposite directions the strain of support will fall upon the holding member which is held in direct engagement with the bars of the link and the free end of the coupling member.

Of course it is understood that the rela tive proportions and positions of the link,

the coupling and the holding member can be varied to suit the conditions demanded and the Work to be performed.

WVhat I claim is 1. A fusible link comprising a link, a coupling pivotally secured to said link, a non-fusible holding member interposed between the link and coupling, a fusible material adapted to bind said holding member to the link member and closure terminals engaging the said coupling and link mem bers.

2. A fusible link comprising a link, a non-fusible holding member, a fusible material adapted to bind said holding member to said link, a coupling pivotally attached to said link with the holding member interposed between the free end of the coupling and the link, and closure terminals engaging the link and the coupling. 4

3. A fusible link comprising a closed link, a non-fusible holding member contained within said linkbut incapable of passing therethrough, a fusible material adapted to bind said holding member within said link, a coupling pivotally attached to one end of said link in a manner to permit the free end thereof to project through. said link and. er

gage but not restrain the holding member and closure terminals engaging the link and coupling.

l. A fusible link comprising a closed link,

' a ball shaped non-fusible holding member,

a fusible material adapted to bind said holding member Within said link, a coupling pivotally attached to one end of said link in a manner to permit the free end thereof to project through the link and engage the holding member and a loop formed in said coupling between the pivot point and the free end, and closure terminals one of Which engages the loop in the coupling and the other the link whereby the free end of said coupling is held in engagement With the holding member.

5. A fusible link comprising a closed link, a coupling pivotally attached to one end of said link in a manner to permit the free end thereof to project through the link, a ball shaped nonfusible holding member interposed between the free end of the coupling and the link, a fusible material adapted to bind said holding member to the link and closing terminals, one of Which engages the coupling and the other the link, whereby the free end of said coupling is held in engagement With the holding member.

PETER C. LENZ Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

